Security cap for plug lock



FIG. 1 is an isometric view of the present invention from a front end;

FIG. 2 is a side view of the present invention, all sides being identical; and,

FIG. 3 is a front end of the present invention.

The broken line showing in FIGS. 1-2 is for illustrative purposes only and forms no part of the claimed design, the rear end has no ornamental features. 

The ornamental design for the security cap for plug lock, as shown and described. 